We present the thickness-dependent electrical properties of mechanically exfoliated single crystal Ta₄Pd₃Te₁₆ nanoribbons. By decreasing the nanoribbon thickness in the range of 500–20 nm, we observed a suppression of superconductivity driven by both the thickness and the external magnetic field. In particular, for the thinner nanoribbons with the thickness less than 40 nm, there is a non-zero resistance state extending down to low temperature, followed by the loss of superconductivity when the thickness is decreased to the order of the coherence length. We found that the theory of a thermally activated phase slip can well describe the temperature dependence of the resistance below T_c. The disorder-induced enhanced Coulomb interaction with the decrease in the thickness is expected to be dominant in the gradual crossover behavior from superconducting to normal or very weakly insulating behavior in the low-dimensional system.

中文翻译：

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Ta4Pd3Te16单晶纳米带中超导性的厚度依赖性

我们介绍了机械剥落的单晶Ta ₄ Pd ₃ Te ₁₆纳米带的厚度依赖性电性能。通过在500–20 nm的范围内减小纳米带的厚度，我们观察到了由厚度和外部磁场共同驱动的超导抑制作用。尤其是，对于厚度小于40 nm的较薄的纳米带，存在一个非零电阻状态，该状态一直延伸到低温，随后当厚度减小到相干长度的量级时，超导性就会丧失。我们发现，热活化相移理论可以很好地描述低于T _c的电阻的温度依赖性。。在低维系统中，从超导到正常或非常弱的绝缘行为，在厚度逐渐减小的无序诱导的增强库仑相互作用中，预计将占主导地位。